gcc/testsuite/gcc.target/i386/pr48678.c

   1 /* PR target/48678 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -msse2" } */
   4
   5 #include <emmintrin.h>
   6
   7 typedef short T __attribute__((may_alias));
   8 struct S { __m128i d; };
   9
  10 __m128i
  11 foo (short *x, struct S *y, __m128i *z)
  12 {
  13   struct S s = *y;
  14   ((T *) &s.d)[0] = *x;
  15   return _mm_cmpeq_epi16 (s.d, *z);
  16 }